<template>
  <div class="app-container">
    <mt-header fixed title="🐂🐎项目">
      <span slot="left">
        <mt-button icon="back" @click="goBack" v-show="flag">返回</mt-button>
      </span>
    </mt-header>

    <transition>
      <router-view></router-view>
    </transition>

    <nav class="mui-bar mui-bar-tab">
      <router-link class="my-tab-item" to="/home">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="my-tab-item" to="/member">
        <span class="mui-icon mui-icon-contact"></span>
        <span class="mui-tab-label">会员</span>
      </router-link>
      <router-link class="my-tab-item" to="/shopcar">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart">
          <span class="mui-badge" id="badge">{{ totalCount }}</span>
        </span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="my-tab-item" to="/search">
        <span class="mui-icon mui-icon-search"></span>
        <span class="mui-tab-label">搜索</span>
      </router-link>
    </nav>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
export default {
  data() {
    return {
      flag: true,
    };
  },

  methods: {
    goBack() {
      //点击返回按钮,向后跳转
      this.$router.go(-1);
    },
    created() {
      if (this.$route.path === "/home") {
        this.flag = false;
      } else {
        this.flag = true;
      }
    },
  },
  watch: {
    //当页面刷新的时候,不会触发watch中监听的路由地址的变化
    "$route.path": function (newVal, oldVal) {
      if (newVal === "/home") {
        this.flag = false;
      } else {
        this.flag = true;
      }
    },
  },
  computed: {
    ...mapGetters(["totalCount"]),
  },
};
</script>

<style lang="scss" scope>
.app-container {
  padding-top: 40px;
  padding-bottom: 50px;
  overflow: hidden;
  // position: relative;
  // z-index: 0;
}

// 动画效果
.v-enter {
  opacity: 0;
  //让即将进入的页面，向右偏移100%屏幕的宽度
  transform: translateX(100%);
}
.v-leave-to {
  opacity: 0;
  //让即将进入的页面，向右偏移100%屏幕的宽度
  transform: translateX(-100%);
  position: absolute;
}
.v-enter-active,
.-v-leave-active {
  transition: all 0.4s ease;
}
.mint-header {
  z-index: 99999 !important;
}
.mui-bar-tab .my-tab-item.mui-active {
  color: #007aff;
}
.mui-bar-tab .my-tab-item {
  display: table-cell;
  overflow: hidden;
  width: 1%;
  height: 50px;
  text-align: center;
  vertical-align: middle;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: #929292;
}
.mui-bar-tab .my-tab-item .mui-icon {
  top: 3px;
  width: 24px;
  height: 24px;
  padding-top: 0;
  padding-bottom: 0;
}
.mui-bar-tab .my-tab-item .mui-icon ~ .mui-tab-label {
  font-size: 11px;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
}
</style>